Answer:
a) 9.56%
b) 0.0019
Step-by-step explanation:
a) Find the z-scores.
z = (x − μ) / σ
z₁ = (-0.0050) / 0.0030
z₁ = -1.67
z₂ = (0.0050) / 0.0030
z₂ = 1.67
Find the probability using a chart or calculator.
P(Z < -1.67 or Z > 1.67) = 2 P(Z < -1.67)
P(Z < -1.67 or Z > 1.67) = 2 (0.0478)
P(Z < -1.67 or Z > 1.67) = 0.0956
b) Use a chart or calculator to find the z-score.
P(Z < -z or Z > z) = 0.01
P(Z < -z) = 0.005
z = 2.576
Find the standard deviation.
z = (x − μ) / σ
2.576 = (0.0050) / σ
σ = 0.0019
Edudig Digger
£35950
Samir buys this digger and expects to use it for 1250 hours each year.
The digger will decrease in value at a yearly rate of 18% of its value at the end of the previous
year.
Use this information to calculate the decrease in value of Samir's digger when it has been
used for 10000 hours.
Answer: To calculate the decrease in value of Samir's digger after 10000 hours, we need to determine its value at the end of each year, taking into account the yearly depreciation of 18%.
Here's the calculation for the first year:
Value at the end of Year 1 = £35950 - (£35950 * 18%) = £29576
And for the second year:
Value at the end of Year 2 = £29576 - (£29576 * 18%) = £24480.48
And so on, until we reach 10000 hours. To determine the exact value after 10000 hours, we would need to perform the calculation for each year until we reach the total number of hours used. However, this calculation would involve multiple steps and can become quite complex. A simpler way to estimate the decrease in value would be to use the concept of present value.
A quiz had 20 questions. Andre scored 16 of them correctly. What was
Andre's percent score? *
Answer:
He got an 80 percent.
Step-by-step explanation:
Round to the nearest thousand. Use the number line to model your thinking. 32,879
Answer:
33,000
Step-by-step explanation:
What is the mass volume % of a solution made by dissolving 5 grams of solute in enough solvent to give you 30 grams of solution?(density of the solution = 2g/ml)
Answer:
33.3%
Step-by-step explanation:
You want the mass volume % of a solution of 5 grams of solute in 30 grams of solution that has a density of 2 g/mL.
VolumeThe volume of the solution is its mass divided by its density.
V = m/ρ
V = (30 g)/(2 g/mL) = 15 mL
Mass/Volume %Then the ratio of mass of solute to volume of solution is ...
(5 g)/(15 mL) = 1/3 g/mL
Expressed as a percentage, that is ...
(1/3 g/mL) · 100% = 33.3% mass/volume
__
Additional comment
It is usually easier to measure the volume of a liquid solution than to measure its mass. The quantity of interest in a solution is often the mass of the solute it contains, so a mass/volume ratio has a certain practicality.
The highway fuel economy of a 2016 Lexus RX 350 FWD 6-cylinder 3.5-L automatic 5-speed using premium fuel is a normally distributed random variable with a mean of μ = 26.50 mpg and a standard deviation of σ = 3.25 mpg.
(a) What is the standard error of X¯¯¯
, the mean from a random sample of 25 fill-ups by one driver? (Round your answer to 4 decimal places.)
The standard error represents the average deviation of the sample means from the true population mean. Rounding this value to four decimal places, the standard error of X¯¯¯ is approximtely 0.6500 mpg.
A smaller standard error indicates that the sample means are more likely to be close to the population mean.To calculate the standard error of X¯¯¯, the mean from a random sample of 25 fill-ups by one driver, we can use the formula:
Standard Error (SE) = σ / sqrt(n),
where σ is the standard deviation and n is the sample size.
In this case, the standard deviation (σ) is given as 3.25 mpg, and the sample size (n) is 25.
Plugging in these values into the formula, we have:
SE = 3.25 / sqrt(25).
Calculating the square root of 25, we get:
SE = 3.25 / 5.
Performing the division, we find:
SE ≈ 0.65.
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Find the missing side
By using trigonometry, the missing sides are
Example 1: x = 16.7
Example 2: x = 3.2
Example 3: x = 23.5
Example 4: x = 9.3
Trigonometry: Determining the values of the missing sidesFrom the question we are to determine the value of the missing sides in the given triangles
We can determine the value of the missing sides by using SOH CAH TOA
Example 1
Angle = 42°
Opposite side = x
Hypotenuse = 25
Thus,
sin (42°) = x / 25
x = 25 × sin (42°)
x = 16.7
Example 2
Angle = 75°
Opposite side = 12
Adjacent side = x
Thus,
tan (75°) = 12 / x
x = 12 / tan (75°)
x = 3.2
Example 3
Angle = 36°
Hypotenuse side = x
Adjacent side = 19
Thus,
cos (36°) = 19 / x
x = 19 / cos (36°)
x = 23.5
Example 4
Angle = 53°
Opposite side = x
Adjacent side = 7
Thus,
tan (53°) = x / 7
x = 7 × tan (53°)
x = 9.3
Hence,
The missing sides are 16.7, 3.2, 23.5 and 9.3
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determine the inclination of the following straight line
1. y=x+3 2) 3x-2y = 6
The inclination of the line represented by the equation y = x + 3 is 1, and the inclination of the line represented by the equation 3x - 2y = 6 is 3/2.
To determine the inclination (or slope) of a straight line, we can examine the coefficients of the variables x and y in the equation of the line.
The inclination represents the ratio of how much y changes with respect to x.
Equation: y = x + 3
In this equation, the coefficient of x is 1, which means that for every increase of 1 in x, y also increases by 1.
This indicates that the inclination of the line is positive, meaning it slopes upwards as x increases.
Since the coefficient of x is 1, the inclination can be expressed as 1/1 or simply 1.
Equation: 3x - 2y = 6
To determine the inclination, we need to rearrange the equation in slope-intercept form (y = mx + b), where m represents the slope.
First, isolate y:
-2y = -3x + 6
Divide the entire equation by -2 to solve for y:
y = (3/2)x - 3
Now we can observe that the coefficient of x is 3/2.
This indicates that for every increase of 1 in x, y increases by 3/2. Therefore, the inclination of this line is positive, indicating an upward slope.
The inclination can be expressed as 3/2.
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Use the Laws of logarithms to rewrite the expression
The expression log₃(x²∛y²) using the laws of logarithms is 2log₃(x) + 2/3log₃(y)
Rewriting the expression using the laws of logarithmsFrom the question, we have the following parameters that can be used in our computation:
log₃(x²∛y²)
The product law of logarithms states that
log(ab) = log(a) + log(b)
Using the above as a guide, we have the following:
log₃(x²∛y²) = log₃(x²) + log₃(∛y²)
The power law of logarithms states that
log(aᵇ) = blog(a)
Using the above as a guide, we have the following:
log₃(x²∛y²) = 2log₃(x) + 2/3log₃(y)
This means that the values of A and B are A = 2 and B = 2/3
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Find the appropriate side length of a square game board with an area of 175 inch squared
Answer:
13.29 inch
Step-by-step explanation:
Given:
Square game board.
Area of square game board = 175 sq inch
To find:
The side length of the square board game.
Solution:
First of all, we need to know the formula for area of a square.
Let us have a look at the formula for area of a square.
\(Area = Side\times Side\)
OR
\(Area = Side^2\)
Putting value of area = 175 sq in and let us find the value of Side.
\(175=Side^2\\\Rightarrow Side = \sqrt{175}\\\Rightarrow Side \approx \bold{13.29\ inch}\)
Therefore, the answer is:
The appropriate side length of the square game board = 13.29 inch
Simplify: 22w - (-14w)
Answer:
36w
Step-by-step explanation:
need help with this ASAP
!!!!!!!!!!!!!!!!!!!!!!!!
The fence in dead center is about 399 feet from the third base.
What is the Pythagorean Theorem?The Pythagorean Theorem states that in the case of a right triangle, the square of the length of the hypotenuse, which is the longest side, is equals to the sum of the squares of the lengths of the other two sides.
Hence the equation for the theorem is given as follows:
c² = a² + b².
In which:
c > a and c > b is the length of the hypotenuse.a and b are the lengths of the other two sides (the legs) of the right-angled triangle.For the triangle in this problem, we have that:
The sides are d ft and 90 ft.The hypotenuse is of 409 ft.Hence the distance is obtained as follows:
d² + 90² = 409²
\(d = \sqrt{409^2 - 90^2}\)
d = 399 ft.
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If x = -3 and y = 4x - 1, then y equals what number
\(\huge\text{Hey there!}\)
\(\large\textsf{y = 4x - 1}\)
\(\large\text{If x= -3, then substitute it into the given equation}\)
\(\large\textsf{y = 4(-3) - 1}\)
\(\large\textsf{4(-3) = \boxed{\bf -12}}\)
\(\large\textsf{y = -12 - 1}\)
\(\large\textsf{-12 - 1 = y}\)
\(\large\textsf{-12 - 1 = \boxed{\bf -13}}\)
\(\boxed{\boxed{\large\textsf{Answer: \huge \bf y = -13}}}\huge\checkmark\)
\(\large\text{Good luck on your assignment and enjoy your day!}\)
~\(\frak{Amphitrite1040:)}\)
\( \quad \quad \quad \quad\tt{y = 4x - 1}\)
\( \quad \quad \quad \quad\tt{y = 4( - 3) - 1}\)
\( \quad \quad \quad \quad\tt{y = (- 12)- 1}\)
\( \quad \quad \quad \quad\tt{y = - 13}\)
Hence, The value of y is:\( \quad \quad \quad \quad \boxed{\tt \color{green}{y = - 13}}\)
______
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simplificar y sumar
12 + 7 + 10 =
---- ---- ---
Answer:
12 + 7 = 19
19 + 10 = 29
answear = 29
Derrick and Janis are planting
150 strawberry plants.
The first day, Derrick plants 20% of
the strawberry plants. Janis plants
60% of the strawberry plants.
Eliezer
How many strawberry plants do Derrick and Janis plant on the first day?
Choose one option from each drop-down menu to answer the question.
On the first day, Derrick plants Choose... strawberry plants.
Janis plants Choose... strawberry plants.
Together, they plant a total of Choose... strawberry plants.
X
Derrick and Janis together plant a total of 30 + 90 = 120 strawberry plants on the first day.
To find out how many strawberry plants Derrick and Janis planted on the first day, we need to calculate the sum of the plants they individually planted.
Derrick planted 20% of the 150 strawberry plants:
20% of 150 = (20/100) * 150 = 30 strawberry plants.
Janis planted 60% of the 150 strawberry plants:
60% of 150 = (60/100) * 150 = 90 strawberry plants.
Therefore, on the first day, Derrick and Janis planted a total of 30 + 90 = 120 strawberry plants.
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2(d+9)
I do not know this I need help
Answer:
Expanding the expression 2(d+9) gives:
2(d+9) = 2*d + 2*9
Simplifying the expression gives:
2(d+9) =2d + 18
Therefore, 2(d+9) is equivalent to 2d +18.
The simplified expression is:
↬ 2d + 18Work:
To simplify this expression, I distribute 2 through the parenthesis:
\(\sf{2(d+9)}\)
\(\sf{2\cdot d + 2 \cdot9}\)
\(\sf{2d+18}\)
Hence, the answer is 2d + 18.1 O 2. 6 7xS m= 6 mel none 23,231 in (-5.-5) Find the Volume: radius=15 in height=30 in 4 -8
Volume of a cylinder = π r^2 h
Where:
r= radius = 15 in
h= heigth = 30 in
Replacing:
V = π 15^2 30 = 21,205.75 in3
A rocket is launched from the top of a building. The flight path is modelled by h = -4t2 + 16t + 24
where h is the height of the rocket from the ground in metres, and t is the time in seconds. What is the initial height of the rocket, when will the rocket hit the ground and what is the height of the rocket after 4 seconds
The initial height of the rocket is 24 metres, the rocket hit the ground in 0.88 seconds and the height of the rocket after 4 seconds is 24 metres.
What is quadratic equation?A quadratic equation is a second-order polynomial equation in a single variable x , ax²+bx+c=0. with a ≠ 0 .
The initial height of the rocket is given by the value of h when t = 0:
h(t)=-4t² + 16t + 24
h(0)=-4(0)² + 16(0) + 24
h(0)=24
So the initial height of the rocket is 24 metres.
The rocket will hit the ground when its height is 0 metres, so we can set h = 0 in the equation and solve for t:
0 = -4t²+ 16t + 24
-4t² + 16t + 24 = 0
t=-0.88 seconds
So the rocket will hit the ground after approximately 0.88 seconds.
The height of the rocket after 4 seconds is given by:
h(4)== -4(4)²+ 16(4) + 24
=-64+64+24
=24
So the height of the rocket after 4 seconds is 24 metres.
Hence, the initial height of the rocket is 24 metres, the rocket hit the ground in 0.88 seconds and the height of the rocket after 4 seconds is 24 metres.
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A taco stand sells 296 tacos in four hours. At this rate, how many tacos would sell in 1/2 an hour?
Answer:
the taco stand would sell 37 tacos in 1/2 an hour.
Answer:
37
Step-by-step explanation:
296 divide by 4 = 74
74 divide by 2 = 37
What is the best estimate of the sum of 5 1/5 and 8 5/6
The necessary interventions for a patient with acute pan-creatitis who is at risk for paralytic ileus are options 1, 2, 4, and 5. Because, The common consequence of acute pan-creatitis known as paralytic ileus prevents the intestines' normal motility by inflaming the tissues around it.
(1).Provide enteral feedings: Enteral nutrients may help to encourage bowel movement.
(4).Ask if patient has passed : The passing of flatus can indicate the return of bowel function
(5).Maintain nasogastric tube : An NG tube can aid in stomach decompression and stop gastric distension.
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How many Solutions does the equation 3x -5 = -3 have ?
Answer:
One solution
Step-by-step explanation:
The only solution is x = 2/3
Answer:
3x-5=-3=19
Step-by-step explanation:
Find the midpoint between (-9, 3) and (5, 7). PLEASE SOLVE THIS QUICK!! DUE IN AN HOUR
Answer:
(-2,5)
Step-by-step explanation:
\(▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪\)
We know that mid - point of a line segment divides it into two equal parts, that is it divides the segment in the ratio of 1 : 1, so let's find the coordinates of the mid point of line segment joining points (-9 , 3) and (5 , 7).
let the coordinates of the points be x and y, now
\(m = 1\)\(n = 1\)\(x_2 = 5\)\(x_1 = - 9\)\(y_2 = 7\)\(y_1 = 3\)Using section formula :
value of x :
\(x = \dfrac{mx_2 - nx_1}{m + n} \)\(x = \dfrac{(1 \times 5) - (1 \times - 9)}{1 + 1} \)\(x = \dfrac{5 - ( - 9)}{2} \)\(x = \dfrac{5 + 9}{2} \)\(x = \dfrac{14}{2} \)\(x = 7\)value of y :
\(y = \dfrac{my_2 -ny_1 }{m+ n} \)\(y = \dfrac{(1 \times 7) - (1 \times 3)}{1 + 1} \)\(y = \dfrac{7 - 3}{2}\)\(y = \dfrac{4}{2} \)\(y = 2\)So, coordinates of the point which is midpoint of the given line is :
\( \boxed{ \boxed{ (7, 2)}}\)
Solve for x.
OA. 9
OB. 1
OC. 4
OD.7
The value x in the secant line using the Intersecting theorem is 4.
What is the value of x?Intersecting secants theorem states that " If two secant line segments are drawn to a circle from an exterior point, then the product of the measures of one of secant line segment and its external secant line segment is the same or equal to the product of the measures of the other secant line segment and its external line secant segment.
From the figure:
First sectant line segment = ( x - 1 ) + 5
External line segment of the first secant line = 5
Second sectant line segment = ( x + 2 ) + 4
External line segment of the second secant line = 4
Using the Intersecting secants theorem:
5( ( x - 1 ) + 5 ) = 4( ( x + 2 ) + 4 )
Solve for x:
5( x - 1 + 5 ) = 4( x + 2 + 4 )
5( x + 4 ) = 4( x + 6 )
5x + 20 = 4x + 24
5x - 4x = 24 - 20
x = 4
Therefore, the value of x is 4.
Option C) 4 is the correct answer.
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Tom owns a pizza shop. He makes 30 cheese pizzas each day. Depending on how much time he has, Tom also makes some pepperoni pizzas every day. On Friday, he spent
4 hours making pepperoni pizzas, and he made 7 pepperoni pizzas every hour.
When a constant force is applied to an object, the acceleration of the object varies inversely with its mass. When a certain constant force acts upon an object
with mass 4 kg, the acceleration of the object is 9 m/s². When the same force acts upon another object, its acceleration is 6 m/s². What is the mass of this
object?
Step-by-step explanation:
a = k/m or ma = k
using 4 and 9 4* 9 = k = 36
then the equation becomes:
ma = 36
using a = 6
6 * m = 36 shows m = 6 kg
10 = 2- 4(ax - 3) solve for x
Answer:
x=\(\frac{1}{a}\)
Step-by-step explanation:
Answer:
\(\frac{a}{a} = x\)
Step-by-step explanation:
==================================================================
What we have to do is solve for x, meaning we have to get everything away from the x.
10 = 2 - 4(ax - 3)
Subtract 2 from both sides.
8 = -4(ax - 3)
Now divide by -4 from both sides.
-2 = ax - 3
Add 3 to both sides.
1 = ax
Finally, divide by a to both sides.
\(\frac{a}{a} = x\)
==================================================================
please help me with my online classwork!
Answer:
840 cm²---------------------------
There are two triangular faces with base of 16 cm and height of 15 cm and three rectangular faces.
Find the sum of areas of all five faces:
S = 2*(1/2)*16*15 + (17*2 + 16)*12 = 240 + 600 = 840vertex: (5,4) focus (-5,4)
Given, vertex: (5,4) focus (-5,4).
Since the y coordinates of the vertex and the focus are the same, the focus and the vertex are on the same horizontal line, y=4. So,the axis of symmetry is a horizontal line.
SInce vertex: (5,4) and focus (-5,4), we find that the focus is at the left of the vertex. So, the parabola opens leftwards.
So, the equation of parabola is,
\(\begin{gathered} (y-k)^2=4a(x-h) \\ \text{Here, vertex(}h,k)=(5,4) \end{gathered}\)a=-5-(5)=-10 , since y coordinates are same.
Now, above equation becomes,
\(\begin{gathered} (y-4)^2=4\times(-10)(x-5) \\ (y-4)^2=-40(x-5) \end{gathered}\)So, the equation of the parabola is,
\(\begin{gathered} \\ (y-4)^2=-40(x-5) \end{gathered}\)Please help me with 15 & 16. Step by Step!!!!
15. The length of a rectangle is four times its width. If its width is x^5 units, what is the area of the rectangle?
16. The width of a rectangular prism is six times its length. The height is five times its length. If its length is m units, what is the volume of the prism?
Answer:
15. 4x¹⁰
16. 30m³
Step-by-step explanation:
15. Area of Rectangle is given by A=LW
since W=x⁵ and L is 4 times W, L=4x⁵
therefore, A = x⁵(4x⁵) = 4x¹⁰
16. Volume of Rectangular Prism is V=LWH
W=6L=6m and H=5L=5m and L=m
so V = m(6m)(5m) = 30m³
\(3x^{2} +10x-8=0\\\)
An airplane leaves and airport and flies due West 120 miles and then 150 miles in the direction south 39.17° west. How far is the plane from the airport (round to the nearest mile)
Okay, here we have this:
Considering the provided information we are going calculate how far is the plane from the airport, so we obtain the following using the law of cosines:
\(\begin{gathered} a=\sqrt[]{120^2+150^2-2\cdot120\cdot150\cdot\cos (129.17)} \\ a\approx244\text{ miles} \end{gathered}\)Finally we obtain that the plane is approximately 244 miles far from the airport.